Ichnology of mixed siliciclastic-carbonate sedimentary cycles and their sequence stratigraphic context: Kaladongar Formation (Middle Jurassic) of Kachchh, western India
Journal Title: Volumina Jurassica - Year 2015, Vol 13, Issue 2
Abstract
The Middle Jurassic Kaladongar Formation, Patcham Island, Kachchh, western India, comprises of a 353 m-thick mixed siliciclastic-carbonate succession of asymmetrical shallowing and deepening upward sedimentary cycles. It is subdivided into five main facies i.e., micritic sandstone, allochemic sandstone, sandy allochem limestone, micritic mudrock, and sandy micrite along with shales and conglomerates. Eight trace fossil assemblages comprising 34 ichnogenera are defined, including the [i]Asterosoma[/i], [i]Gyrochorte[/i], [i]Rhizocorallium[/i], [i]Thalassinoides[/i], [i]Planolites[/i]–[i]Palaeophycus[/i], [i]Phycodes[/i], [i]Ophiomorpha[/i], and [i]Skolithos[/i] assemblages that reflect five depositional facies: offshore, transitional, lower, middle, and upper shoreface. The sedimentary packages and associated trace fossil assemblages are separated by various discontinuities, stratigraphic surfaces and stratigraphic boundaries within the succession of the Kaladongar Formation and reveal three phases of regression (RST-I, RST-II and RST-III) and three phases of transgression (TST-II, III and IV) within the 3rd order systems tracts developed in the slowly transgressing sea during the Bajocian-Bathonian time interval.
Authors and Affiliations
Jaquilin JOSEPH, Satish PATEL
Preliminary results of palynological studies of Upper Jurassic flora-bearing deposits from Wólka Bałtowska, NE margin of Góry Świętokrzyskie Mts, Poland
Three sampies of flora-bearing limestone from Wólka Bałtowska were analysed for palynology. They yielded organic-walled dinoflagellate cysts (dinocysts) and sporomorphs, as well as rich phytoclast assemblages including l...
SPOŁECZNA ODPOWIEDZIALNOŚĆ BIZNESU W RODZINNYCH FIRMACH Z SEKTORA MSP BRANŻY ENERGETYCZNEJ
Sektor małych i średnich przedsiębiorstw w Polsce jest jednym z głównych filarów pol-skiej gospodarki. Jego wkład w tworzenie krajowego PKB czy nowych miejsc pracy jest nieoceniony. Mikro, małe oraz średnie przedsiębiors...
Zróżnicowanie litofacjalne osadów keloweju w rejonie Zawiercia
KODEKS ETYCZNY JAKO NARZĘDZIE KREOWANIA ZACHOWAŃ ORGANIZACYJNYCH NA PRZYKŁADZIE POLICJI
On the typological basis of Perisphinctes Waagen, 1869 and the leading modern ammonite superfamily Perisphinctoidea Steinmann, 1890
A re-examination of the type specimen of Ammonites biplex Sowerby, 1821 shows that the reasons previously given for rejecting this species as the type species of Perisphinctes, to be replaced by Amm. variocostatus Buckl...